Ali H. Dogru, SPE, was named the first Saudi Aramco fellow, an honor the company initiated to recognize its scientists who have made groundbreaking contributions. Dogru played a pivotal role in the development of various mathematical reservoir simulators for thermal and chemical oil recovery. At Saudi Aramco, he worked on the development of two proprietary reservoir simulators—POWERS (parallel oil water gas enhanced reservoir simulator) and GigaPOWERS, which the company now uses continuously to help manage oil and gas reservoirs and develop new fields. Dogru earned a combined BS and MS degree in petroleum engineering at Istanbul Technical University, then won a NATO scholarship to study at The University of Texas at Austin (UT), where he earned a PhD in petroleum engineering. He spent some time teaching at both universities, as well as at the Norwegian Institute of Technology. Dogru won a postdoctoral fellowship at the California Institute of Technology at Pasadena, and then joined Core Laboratories Consulting Department, working on EOR projects, CO2, steam, and in-situ combustion pilots; and developing thermal simulators and an early chemical flood simulator. Joining Mobil in 1982, Dogru led a research and development team developing Mobil’s THERMS-1 thermal simulator. He also taught applied mathematics at UT Dallas. In 1988, he transferred to Saudi Aramco as a loanee. Dogru has worked there in various senior research capacities since that time. He received SPE’s Reservoir Description and Dynamics Award in 2008, World Oil’s Innovative Thinker Award in 2010, and the Abu Dhabi International Petroleum Exhibition and Conference best technology team award in 2010. In 2011, Dogru was appointed as a visiting scientist at the Massachusetts Institute of Technology. He received SPE’s 2012 John Franklin Carll Award and became an SPE Distinguished Member.